Tool-holder.



G. R. LAN G. TOOL HOLDER. APPLIOATION FILED JUNE 5, 1909.

Patented Oct. 18,1910.

' vwewbo c WWW q a fig 3 v GEORGE B. LANG, OF MEADVILLE, PENNSYLVANIA.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Oct. 18, 1910.

Application filed June 5, 1909. Serial No. 500,355.

To all whom it may concern:

Be it known that I, GEORGE It. LANG, a citizen of the United States,residing at Meadville, in the county of Crawford and State ofPennsylvania, have invented certain new and useful Improvements in Tool-Holders, of which the following is a specification.

This invention relates to tool holders and consists in certainimprovements in the construction thereof as will be hereafter fullydescribed and pointed out in the claims.

More particularly the invention relates to a tool holder which ispeculiarly adapted for use with tools of triangular shape in crosssection.

The invention is illustrated in the accompanying drawings as follows:

Figure 1 is a section on the line 11 in Fig. 2. Fig. 2 is a plan view ofthe tool holder with tool arranged at one side. Fig. 3 is a sideelevation of the tool holder shown in Fig. 2. Fig. l is a plan View ofthe tool holder with the tool arranged on the opposite side from thatshown in Fig. 2.

1 marks the body of the tool holder. This has a side protuberance 2 atits front end. A V shaped slot 3 is arranged partly in this protuberanceand partly in the body of the tool holder. The angle of the slot isslightly more acute than that of the tool t so that the initial contactbetween the tool and the side of the slot is'at the upper edge 5, thelower edge 6 being initially out of contact. As the tool is clamped thelip at the outer side of the slot is sprung so that there is in effect aspring clamp for the tool, thus assuring a more certain clamping of thetool. The slot is so positioned that the upper face and side face of thetool are just the right angle to give the desired clearance as clearlyshown in Fig. 1.

The slot extends into the body of the tool holder forming theoverhanging portion 7. The bolt 8 extends vertically through the holder,the holder being provided with the perforation 9 for this purpose. Theupper end 10 of this perforation is enlarged so as to receive the head11 of the bolt. The bolt is provided with a nut 12 at the bottom bywhich it may be turned down on the tool. The bolt has a notch 13 intowhich the tool 4 extends. The larger part 10 of the perforation is ofsufficient depth to permit of a movement of the-head to a clampingposition. In manufacturing, the bolt is placed in the perforation andclamped down, and the slot 13 is milled at the same time as the slot 3is milled. Afterward the bolt is removed and the enlargement 10 slightlydeepened to permit the clamping movement of the bolt. The notch 13 looksthe bolt against turning so it is not necessary to have 'the head extendabove the upper face of the tool holder.

A projection 14 extends outwardly along the inner face of a tool inplace in the tool holder. This, as will be seen, is directly opposed topressure exerted on the tool on the opposite cutting edge. thereforestiffens and supports the tool.

It will be noted that the tool has the cutting edge along its side face.I prefer to have this extend out at least as far as the side of theprotuberance 2 so that any out made by the tool can be followed in on aline with its edge without interference by the tool holder. For thisreason it is preferable to have the working edge along the side of thetool slightly overhang the pro tuberance 2 as clearly shown in Fig. 1.

\Vhat I claim as new is:

1. A tool holder having a. V-shaped slot partly open at the top, thewalls of one of the lower sides of the slot forming a lip projectingbeyond the side of the tool holder above the slot, and leaving anopening at the top of the slot extending partly across the same, andadapted to hold a tool of triangular shape in cross section, with itsedge extending at least flush with the side of the tool holder; andmeans for clamping a tool in the holder.

2. A tool holder having a V-shaped slot partly open at the top, thewalls of one of the lower sides of the slot forming a lip projectingbeyond the side of the tool holder above the slot, and leaving anopening at the top of the slot extending partly across the same, andadapted to hold a tool of triangular shape in cross section with itsedge overhanging and extending beyond the side of the tool holder; andmeans for clamping a tool in the holder.

3. Atool holder, having a slot partly open at the top, the walls of oneof the lower sides of the slot forming a lip projecting beyond the sideof the tool holder above the slot and leaving an opening at the top ofthe slot extending partly across the same, and adapted to hold a tool oftriangular shape in cross section, with its edge extending at least Theprojection flush with the side of the tool holder, the angle at thebottom of the slot being more acute than that of the tool for thepurpose described; and means for clamping the tool in the holder.

4. A tool holder having a V-shaped slot partly open at the top, theWalls of one of the lower sides of the slot forming a li projectingbeyond the side of the tool holder above the slot, and leaving anopening at the top of the slot extending partly across the same, andadapted to hold a tool of triangular shape in cross section and aprojection extending forwardly from the holder with its surface in thesame plane as the inner lower surface of the slot.

5. A tool holder having a V-shaped slot partly open at the top, thewalls of one of the lower sides of the slot forming a lip projectingbeyond the side of the tool holder above the slot, and leaving anopening at the top of the slot extending partly across the same, andadapted to hold a tool of triangular shape in cross section with thecutting edge along the open part of the slot and a bolt for engaging atool in the slot at its upper inner edge.

6. A tool holder having a V-shaped slot partly open at the top, theWalls of one of the lower sides of the slot forming a lip projectingbeyond the side of the tool holder above the slot, and leaving anopening at the top of the slot extending partly across the same, andadapted to hold a tool of triangular shape in cross section With thecutting edge along the open part of the slot; and a bolt for engaging atool in the slot at its upper inner edge, the bolt having a notch intoWhich the tool may enter and be engaged.

7 A tool holder having an open sided V- shaped slot and a perforationextending into the inner part of the slot; a notched bolt arranged inthe perforation and adapted to engage a tool in the slot and having thesupport of the walls of the perforation above the point on the bolt inengagement with the tool.

8. A tool holder having an open sided V- shaped slot, and a perforationextending into the slot, the perforation having one portion enlarged; abolt having a head in the enlarged portion of the perforation providedwith a notch to admit the insertion of a tool in the slot and anengagement of a tool by the bolt, the bolt being supported above thenotch by the Walls of the perforation.

In testimony whereof, I have hereunto set my hand in the presence of twosubscribing witnesses. v

GEORGE R. LANG. \Vitnesses CLINT DENSMORE, RAY C. GUNDAKER.

